Fundamental study on aerodynamic force of floating offshore wind turbine with cyclic pitch mechanism
Fundamental study on aerodynamic force of floating offshore wind turbine with cyclic pitch mechanism
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DOI：
10.1016/j.energy.2016.01.049
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发表时间：
2016-03
期刊：
影响因子：
9
通讯作者：
Qing’an Li;Y. Kamada;T. Maeda;J. Murata;K. Iida;Yuta Okumura
中科院分区：
文献类型：
--
作者：
Qing’an Li;Y. Kamada;T. Maeda;J. Murata;K. Iida;Yuta Okumura
安装在浮动平台上的风力涡轮机受到完全不同的软地基特性的影响，而不是陆上风力涡轮机。浮式海上风力机由于其系泊系统的灵活性，容易受到风的气动力和波浪的水动力等大振动的影响，这可能会影响其性能和结构稳定性。本文通过风洞实验研究了变桨距控制的旋翼推力控制对抑制涡轮不良运动所产生的气动力的影响。在这项研究中，风力机在两种变桨距控制系统下进行了气动力测试：稳态变桨距控制和循环变桨距控制。转子的转速由变速发电机控制，变速发电机可以通过功率系数测量。用六分量天平对模型风力机的力矩和力作用进行了测试。通过周期性螺距测试，可以通过周期性螺距控制任意控制力矩的方向和大小。此外，推力系数的波动可以通过集体螺距控制来控制。这一分析结果将有助于解决通过循环变桨距控制抑制水轮机不良运动的基本设计。
Wind turbines mounted on floating platforms are subjected to completely different and soft foundation properties, rather than onshore wind turbines. Due to the flexibility of their mooring systems, floating offshore wind turbines are susceptible to large oscillations such as aerodynamic force of the wind and hydrodynamic force of the wave, which may compromise their performance and structural stability. This paper focuses on the evaluation of aerodynamic forces depending on suppressing undesired turbine's motion by a rotor thrust control which is controlled by pitch changes with wind tunnel experiments. In this research, the aerodynamic forces of wind turbine are tested at two kinds of pitch control system: steady pitch control and cyclic pitch control. The rotational speed of rotor is controlled by a variable speed generator, which can be measured by the power coefficient. Moment and force acts on model wind turbine are examined by a six-component balance. From cyclic pitch testing, the direction and magnitude of moment can be arbitrarily controlled by cyclic pitch control. Moreover, the fluctuations of thrust coefficient can be controlled by collective pitch control. The results of this analysis will help resolve the fundamental design of suppressing undesired turbine's motion by cyclic pitch control.